<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-alert :closable="false" show-icon title="注意: 只允许为第三季分类设置相关参数" type="warning"></el-alert>
      <!-- 选择商品分类区域 -->
      <el-row>
        <el-col>
          <span>选择商品分类:</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            :options="catelist"
            :props="cateProps"
            @change="handleChange"
            clearable
            v-model="selectedCateKeys"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tab 标签页 -->
      <el-tabs @tab-click="handleTabClick" v-model="activeName">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            :disabled="isBtnDisabled"
            @click="addDialogVisible=true"
            size="mini"
            type="primary"
          >添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  :key="index"
                  @close="handleClose(i,scope.row)"
                  closable
                  v-for="(item,index) in scope.row.attr_vals"
                >{{item}}</el-tag>
                <el-input
                  @blur="handleInputConfirm(scope.row)"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  class="input-new-tag"
                  ref="saveTagInput"
                  size="small"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                ></el-input>
                <el-button
                  @click="showInput(scope.row)"
                  class="button-new-tag"
                  size="small"
                  v-else
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  @click="showEditDialog(scope.row.attr_id)"
                  icon="el-icon-edit"
                  size="mini"
                  type="primary"
                >编辑</el-button>
                <el-button
                  @click="removeParams(scope.row.attr_id)"
                  icon="el-icon-delete"
                  size="mini"
                  type="danger"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            :disabled="isBtnDisabled"
            @click="addDialogVisible=true"
            size="mini"
            type="primary"
          >添加属性</el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  :key="index"
                  @close="handleClose(i,scope.row)"
                  v-for="(item,index) in scope.row.attr_vals"
                >{{item}}</el-tag>
                <el-input
                  @blur="handleInputConfirm(scope.row)"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  class="input-new-tag"
                  ref="saveTagInput"
                  size="small"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                ></el-input>
                <el-button
                  @click="showInput(scope.row)"
                  class="button-new-tag"
                  size="small"
                  v-else
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  @click="showEditDialog(scope.row.attr_id)"
                  icon="el-icon-edit"
                  size="mini"
                  type="primary"
                >编辑</el-button>
                <el-button
                  @click="removeParams(scope.row.attr_id)"
                  icon="el-icon-delete"
                  size="mini"
                  type="danger"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加参数的对话框 -->
    <el-dialog
      :title="'添加'+ titleText"
      :visible.sync="addDialogVisible"
      @close="addDialogClosed"
      width="50%"
    >
      <el-form :model="addForm" :rules="addFormRules" label-width="100px" ref="addFormRef">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span class="dialog-footer" slot="footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button @click="addParams" type="primary">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数的对话框 -->
    <el-dialog
      :title="'修改'+ titleText"
      :visible.sync="editDialogVisible"
      @close="editDialogClosed"
      width="50%"
    >
      <el-form :model="editForm" :rules="editFormRules" label-width="100px" ref="editFormRef">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span class="dialog-footer" slot="footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button @click="editParams" type="primary">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data () {
    return {
      // 商品分类列表
      catelist: [],
      // 级联选择框的配置对象
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择框双向绑定到的数组
      selectedCateKeys: [],
      // 被激活的页签的名称
      activeName: 'many',
      // 动态参数数据
      manyTableData: [],
      // 静态属性数据
      onlyTableData: [],
      addDialogVisible: false,
      //  添加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
      },
      editDialogVisible: false,
      editForm: {
        attr_name: ''
      },
      editFormRules: {
        attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
      },
      inputVisible: false,
      inputValue: ''
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取所有的商品分类列表
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      this.catelist = res.data
      // console.log(this.catelist)
    },
    handleChange () {
      this.getParamsData()
    },
    async getParamsData () {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败')
      }
      // this.$message.success('获取参数成功')
      // console.log(res.data)
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    // tab页签点击事件的处理函数
    handleTabClick () {
      // console.log(this.activeName)
      this.getParamsData()
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮添加参数
    addParams () {
      this.$refs.addFormRef.validate(async vaild => {
        if (!vaild) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.$message.success('添加参数成功')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    async showEditDialog (attrid) {
      // 查询你当前参数的信息
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attrid}`, { params: { attr_sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 重置修改的表单
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮修改参数
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_sel: this.activeName, attr_name: this.editForm.attr_name })
        if (res.meta.status !== 200) {
          return this.$message.error('更新参数失败')
        }
        this.$message.success('更新成功')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    async removeParams (attrid) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
        center: true
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消了删除')
      }
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attrid}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.getParamsData()
      this.$message.success('删除成功')
    },
    // 文本框失去焦点 或摁下了 Enter都会触发
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    async saveAttrVals (row) {
      // 发送请求 保存此操作
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败')
      }
      this.$message.success('修改参数项成功')
    },
    showInput (row) {
      row.inputVisible = true
      // $nextTick 方法的作用，就是当页面上的元素被重新渲染之后，才会指定回到函数的代码
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    isBtnDisabled () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId () {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.el-row {
  margin-top: 20px;
}
.el-cascader {
  margin-left: 10px;
}
.el-tag,
.el-button,
.el-input {
  margin-left: 15px;
}
.input-new-tag {
  width: 120px;
}
</style>